Table 7. Pearson correlation factors between conventional 2D and dose-volume parameters by table-type of the treatment site .
| Variable | Left PCF (P-value) |
Right PCF (P-value) |
| CLD vs. DVH (ipsilateral lung) | ||
| V5Gy (%) | 0.413 (0.001) | 0.557 (< 0.001) |
| V10Gy (%) | 0.528 (< 0.001) | 0.614 (< 0.001) |
| V20Gy (%) | 0.588 (< 0.001) | 0.675 (< 0.001) |
| Dmean (Gy) | 0.082 (0.537) | 0.596 (< 0.001) |
| MLD vs. DVH (ipsilateral lung) | ||
| V5Gy (%) | 0.372 (0.004) | 0.563 (< 0.001) |
| V10Gy (%) | 0.463 (< 0.001) | 0.607 (< 0.001) |
| V20Gy (%) | 0.594 (< 0.001) | 0.660 (< 0.001) |
| Dmean (Gy) | 0.534 (< 0.001) | 0.666 (< 0.001) |
| CWS vs. DMax breast | 0.149 (0.423) | 0.057 (0.761) |
CLD: Central lung depth; DVH: Dose-volume histogram; MLD: Maximum lung depth; Vx: Volume of lung or heart receiving xGy; Dmean: Mean dose; CWS: Chest wall separation; Dmax: Maximum dose; PCF: Pearson correlation factor; PCF significant if P ≤ 0.01; PCF ≥ 0.7: Good correlation; PCF ≥ 0.5 and < 0.7: Moderate correlation. PCF < 0.5: Poor correlation.